P0725moderate severityPowertrain
Engine Speed Input Circuit Malfunction
on 2009 Audi Q7 3.0L Supercharged V6 · AWD
What this code means
The transmission controller is not receiving a valid engine speed signal. This RPM input is needed to calculate proper shift points and lockup.
Symptoms
- Harsh or erratic shifting
- Torque converter lockup problems
- Check engine light on
Common causes
- Faulty engine speed sensor
- Wiring fault to TCM
- Corroded connector
- Faulty PCM/TCM
Diagnostic steps
- Scan codes and freeze frame data
- Compare engine RPM at PCM and TCM
- Inspect wiring and connectors
- Repair circuit or replace sensor
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